I found the following YouTube video link on EFF.org of Senator Ron Wyden (D-OR). The Senator speaks out for American rights and privacy before the Senate. In spite of legislation trends, Congress may not be so one sided against individual rights as you might imagine. Senator Wyden provides an interesting pro-privacy perspective along with some lessons from history. Likewise, contrary Senate opinion would be interesting to hear. Unfortunately, understanding lawmaker decisions fully is difficult since they are predicated upon material non-public or classified information in part.
Media: Wyden Floor Statement on FISA Reauthorization Act and Proposed Amendments
Of course, the FISA extension passed by a landslide. If your curious to see how your state represented you please refer to the following link, FISA Amendments Act of 2008 Five Year Extension.